rem sleep: meaning, definition, pronunciation and examples
Low (C1/C2)Academic, Technical, Medical, Scientific, Educated Everyday
Quick answer
What does “rem sleep” mean?
A distinct stage of sleep characterized by rapid eye movements, high brain activity similar to wakefulness, and vivid dreaming.
Audio
Pronunciation
Definition
Meaning and Definition
A distinct stage of sleep characterized by rapid eye movements, high brain activity similar to wakefulness, and vivid dreaming.
The cyclical sleep phase crucial for memory consolidation, emotional regulation, and brain development. It is one of the main stages in the sleep cycle, alongside non-REM sleep.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. 'REM sleep' is universal. Pronunciation of the acronym may vary slightly in emphasis.
Connotations
Identical technical/scientific connotations in both varieties.
Frequency
Equal frequency in relevant contexts (psychology, medicine, wellness).
Grammar
How to Use “rem sleep” in a Sentence
[Subject] enters/experiences/has REM sleep.REM sleep is associated with [noun phrase].A period of REM sleep lasts for [duration].Vocabulary
Collocations
Examples
Examples of “rem sleep” in a Sentence
verb
British English
- The patient will **REM** for approximately 90 minutes per night. (technical)
American English
- Infants **REM** a much higher percentage of the night than adults. (technical)
Usage
Meaning in Context
Business
Rare, except in corporate wellness contexts: 'The app tracks your REM sleep to improve rest.'
Academic
Primary context. Used in psychology, neuroscience, and medical papers: 'The study examined cortisol levels during REM sleep.'
Everyday
Used in educated conversation about health, sleep tracking, and dreams: 'My fitness watch says I didn't get much REM sleep last night.'
Technical
Standard term in sleep science and clinical settings: 'Patients with narcolepsy often enter REM sleep immediately.'
Vocabulary
Synonyms of “rem sleep”
Strong
Neutral
Weak
Vocabulary
Antonyms of “rem sleep”
Watch out
Common Mistakes When Using “rem sleep”
- Pronouncing it as a word /rɛm/ instead of the letters R-E-M.
- Using it as a countable noun (*'I had three REM sleeps last night') instead of an uncountable/phase noun ('I had three periods of REM sleep').
- Confusing it with 'deep sleep', which is a different stage (usually Stage 3 non-REM).
FAQ
Frequently Asked Questions
REM sleep cycles occur approximately every 90 minutes, with each REM period becoming longer as the night progresses.
Typically, no. The body experiences muscle atonia (temporary paralysis) during REM sleep, which prevents you from acting out your dreams. An exception is REM sleep behaviour disorder.
No. 'Deep sleep' usually refers to Stage 3 non-REM sleep, which is characterized by slow brain waves and is important for physical restoration. REM sleep is a separate, active stage.
Most mammals and birds show signs of REM sleep. The amount varies greatly; for example, dolphins have very little, while certain rodents and humans have relatively high amounts.
A distinct stage of sleep characterized by rapid eye movements, high brain activity similar to wakefulness, and vivid dreaming.
Rem sleep is usually academic, technical, medical, scientific, educated everyday in register.
Rem sleep: in British English it is pronounced /ˌɑːr iː ˈem sliːp/, and in American English it is pronounced /ˌɑːr iː ˈem sliːp/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Chasing REM sleep (trying hard to achieve quality sleep).”
Learning
Memory Aids
Mnemonic
REM = Rapid Eye Movement. Remember your eyes moving under your lids while you watch vivid dreams in your head.
Conceptual Metaphor
THE BRAIN IS A COMPUTER DEFRAGGING/SAVING DATA (during REM sleep).
Practice
Quiz
What is a primary function associated with REM sleep?